单项选择题 If a heavy sea strikes the rudder, the shock is transmitted through （） to the rams, this cause a sudden increase in oil pressure in one of the cylinders.

单项选择题 Additional heat extraction from the exhaust gases can be effected by adding an （） section to the unit in plants.

单项选择题 Oil water separators are used to ensure that ships don’t discharge oil when （） bilge water.